Convert PNG Images to PDF Documents in a Snap

Convert any PNG image to PDF without losing quality. Try it for free.
Drag & Drop the File Here
Choose File

How it works

Getting Started

Convert any PNG image to a PDF document in seconds. Choose a PNG file on your computer or phone, or drag and drop it into the box.

Convert PNG to PDF

With AltoConvertPNGtoPDF, there’s no need to download and install any software on your device. You can use the platform on any desktop or mobile device.

Run it Free of Charge

Save your money and time. Our web-based converter is available free of charge. Try it now and enjoy an unlimited number of free conversions.

Encrypted Data Transfer

Rest assured, your data is secure and backed up. Each file you upload to our online app is processed via an encrypted connection.

Compatible with All Devices

Easily run the app on MacOS, Linux, Windows and Android devices. All you need is an active Internet connection.

Process Documents Online

Since your files are processed in the cloud, you no longer have to worry about your device’s storage space and memory being taken up.


File extension .png
Internet media type image/png
Description: The PNG (Portable Network Graphic) is a graphics file format used for adding transparencies to an image. PNG is often considered as a replacement for both JPEG and GIF formats and combines the features of both. PNGs enable you to have opaque and transparent components in one picture. Since they offer a better color flexibility, they're considered a great option for web designers.
Technical Details: A PNG file offers a higher quality level than a GIF file. PNG files support both the 24-bit RGB and 32-bit RGBA color profiles but do not support the CMYK profile, simply because they weren’t designed for printing. The reason you would choose this format over GIF is that PNGs don't have copyright limitations and lets you work with a wider range of colors.
Developed by PNG Development Group
Initial Release: 1 October 1996
Useful links:


File extension .pdf
Internet media type application/pdf
Description: PDF stands for Portable Document Format. It was designed to simplify the procedure of sharing files between users who view them on different devices and operating systems. PDF documents can contain both text and graphics objects. The format is widely popular because of its versatility and relatively small size combined with high resolution quality.
Technical Details: A standard PDF is a 7-bit ASCII file with a fixed structure based on the PostScript language. Along with flat text and graphics.A PDF document may include various types of content such as form fields, hyperlinks, bookmarks, buttons, layers, annotations, etc. There is also a possibility to include video content and three dimensional objects.
Developed by ISO
Initial Release: 15 June 1993
Useful links:


Customer Questions and Answers

How do I reduce the size of my e-catalogue? I have about a hundred of PNG files that contain both text and pictures. Will it help if I save them as PDFs? And what’s the easiest way to do that?
Your PNG files contain a lot of graphic information, they will definitely take up less disk space when saved as PDFs. I suggest you trying this online tool called in order to convert them all for free. Good luck!
By Doris on May 27, 2018
I have a large PNG file containing a diagram and a text description. What would be the best choice for an online converter to reduce the file size and while keeping the quality?
With you can convert your PNG diagram and get a high-quality PDF in a few seconds. There are no limitations to the number of files you can upload, as well as to their size.
By David on April 17, 2018
Hi! I'm using a Windows PC and it seems like there's no way I can convert PNG files to PDFs for free using any of the built-in apps. Is there a cross-platform solution maybe? All suggestions are highly appreciated!
Forget about these complications! In fact, it doesn't matter what operating system you use. Go to, upload your PNG files and change them to PDFs in a few clicks. All you need is a stable internet connection!
By Michael on March 21, 2018
See All Question

How Do Users Rate AltoPNGtoPDF?

Our service faciliates the work of over two million people converting PNG images online every year.


Android device users can now easily convert any PNG image to a PDF document. Download the AltoConvertPNGtoPDF mobile app to your smartphone or tablet and convert as many files as you need.

How to Convert PNG to PDF?

These days, there are a variety of document formats that have their own pros and cons. This is good because people can select the most suitable type of format that will meet their specific requirements to the fullest extent. When it comes to storing images and photos, most individuals tend to choose JPG and PNG. However, in some cases you may need to use another format, such as PDF.

As paperless workflow becomes more and more popular, people are searching for the best document management solutions with the best set of features. In our modern world where it is easy to get overwhelmed by choice, it can be rather complicated to select an appropriate document management solution. We suggest you take advantage of online PDF managers that allow you to manipulate your files anytime, anywhere and from any device.

How to Convert PNG Images to PDF Documents(Online & Free)?

As technologies are constantly developing, there are now various converters that give you the ability to manipulate your files in seconds. To save your time and efforts, we offer you to take advantage of online converting tools. They provide users with a number of advantages such as:

  • free and easy usage;
  • step-by-step instruction;
  • cross-platform capability;
  • optimization for mobile devices;
  • ability to download without any additional software;
  • security of your digital papers.

By storing and saving your documents in image format such as PNG, you gain the following benefits:

  1. working with images in PNG is easier than with PDFs;
  2. they ensure the safety of information, because no important data can be extracted;
  3. the quality of images and photos in PNG is better than that of PDFs;
  4. you can effortlessly compress several images into a single ZIP.

Despite the above-mentioned advantages, you should be aware that photos will consume much space on your hard drive. To eliminate this issue, all you have to do is use one of the advanced online converters. The process of changing your PNG document to PDF format is quite simple and only requires a few effortless steps:

  • open a specific digital converting service;
  • upload a PNG you want to change from your computer or a smartphone to a drag and drop box;
  • after that select the “Start now” button to begin the conversion;
  • once a file is transformed, download it to your device or save it to a cloud storage;
  • continue editing your newly created PDF using various tools.

How to guide: How to convert a PNG image to a PDF online

  1. Open the app in your web browser.
  2. Within the app, click Choose File and select a PNG image stored on your local drive.
  3. For files stored online, click one of the cloud storage service icons.
  4. Wait for your upload to complete, then click Convert Now!
  5. Wait while your PDF is being created. Click Cancel to stop.
  6. Click Download Now to save the resulting file to your device.
  7. Click Continue Editing if you want to redact or e-sign the converted PDF document.
  8. Click Start over again if you want to process another PDF file.

How do I save an image as a PDF?

The digital PNG to PDF converters are very user-friendly and provide users with step-by-step instructions:

  1. The process of changing a format takes just a few seconds.
  2. In case you have uploaded a wrong image, you have to click the “Start over again” button to restart the procedure.
  3. Moreover, you have the option to convert multiple PNGs to PDFs at a time and even delete the images or rearrange them in a different order.

To save a transformed PDF file just download it to your computer, smartphone or any mobile device. Saving it to the cloud is also an option.

The key point of converting PNG to PDF online is that you can be sure your files will stay secure, because:

  • the online solutions delete them from a server after they`ve been transformed;
  • they offer an encrypted connection that allows you to securely transform your data.